Heating-stove.



E. F. & G. C. PAQUIN.

HEATING sTovB.

APPLIOATION FILED JULY 3. 1.911.

4E MORRIS PETERS co.. PHOTO-Lindo.. WASHINGTON. D C,

E. F. 6L C.. G. PAQUIN. HEATING STOVE.

APPLIOATION FILED JULY s. 1911.

1,1 12,027. Patented Sept. 29, 1914.

a sH'EBTs-SHBBT 2.

1HE NORRIS PEIERS CO., FHOTO-LITHU., wAsHlNlzToN. n. C.

e. P. e o. c. PAQUIN. l

HEATING STOVB.

APPLICATION FILED JULY 3. 1911.

Patented Sept. 29, 1914.

UNITED STATES PATENT oEEioE.

ELGIN F. PAQUIN, 0F CHARLESTOWN, `NEN HAMPSHIRE, AND CHARLES C.' PAQUIN, 0F

SPRINGFIELD, VERMONT. i

HEATING-STOVE.

Specification of Letters Patent.

Patented Sept. 29, 1914.

Application filed Juy 3, 1911. Serial No. 636,777.

New Hampshire, and CHARLES C. PAQUIN,

a citizen of the United States, residing at Springfield, in the county of Windsor and State of Vermont, have invented certain'new and useful Improvements Stoves; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to stoves, and'more especially to those of that type which are intended for heating purposes; and the object of the invention is to produce a stove having contiguous to its fire box an upright dust passage controlled by a damper which is accessible through the stolting door, a cheek draft chamber forward of the dust passage and extending `thence around and opening through the sides of the fire box near its upper end, a draft passage forward of the dust passage and below said check draft chamber, extending thence downward and thence rearward around the lower porf` tion of the tire pot and opening at the rear into the top of the ash pit., a series of upright flues opening into the interior of the fire pot through ports in its wall, and a drum within the stove body above the fire pot for heating fresh air which is supplied by an upright rear flue and passes into the reticulated dome at the top of the stove.

With these objects in view the invention consists in the improved construction, arrangement and combination of parts hereinafter fully described and afterward specifically claimed.

ln order that its construction and opera-` tion may be readily comprehended, we have illustrated a preferred embodiment of the invention in the accompanying drawings, in which:

Figure l is a side elevation of the stove; Fig. 2 is a central vertical sectional view thereof on the line 2N2 of Fig. 3, being in a plane passing through the stove from front to rear; Fig. 3 is a similar view taken at right angles to Fig. 2, the plane passing through the stove fromside to side; F 1g. 4 is a horizontal sectional view on the plane of the line 5-5 of Figs. 2 and 3.

in Heating- Fig. 5 is a similar view on the plane of the line. 6 6 of Figs. 2 and3. Fig. 6 is a similar view on the plane of the line 7-7 of Fig.3. F 1g. 7 is a front elevation of the lire box with a portion of one corner broken away to show the manner in which the draft passages communicate. Fig. S is a horizontal sectional View on the plane 0f the line 9 9 of Fig. 2 omitting the ribs. Fig. 9 is a vertical sectional view` on a plane cutting through the fire box at an angle of 45 from the plane of Fig. 2. Fig. l() is a sectional view on the horizontal plane indicated by the line ll-ll` of Figs. 2 and 3. Fig. ll is a horizontal sectional view on the plane of the linel2-l2 of Figs. 2 and 3 omitting the ribs. Fig. 12 is a horizontal sectional view on the plane of the line 13-13 of Fig. 2. Fig. l'is a detail sectional view of one of the dampers.

Referring specifically to the drawings, the

` numeral 2l designates the base of the stove in which is located the ash pit 22, and 23 the fire-box or lire-pot whose wall has an inturned iiange 24 at its lower inner edge upo-n which rests a circular rotary grate 25 which is formed with an inverted crown gear 26 meshing with apinion 27 mounted on a shaft 28 and turnable by a crank 29 as usual in rota-ry grates, sothat the grate may be rotated within the lire pot when desired. The body of the grate is archedas best seen in Figs. 2 and 3, and carries upright bosses or pins 80, so that 4as the grate is oscillated or rotated continuously.on its vertical axis the fuel thereon is stirred bythese bosses and the ashes` sifted `through the grate. In the front wall of the tire box 23 is an openf ing 31 above the grate 25 the purpose of which is to permit the removal `of clinlters, cinders or ashes from the fire box when a door 32 with which this opening is normally closed, is.` swung open. vThis opening may be used to dump the fire, by opening its door and rotating thc grate until all the coals fall out through said opening into the ash pit 22.

During the operation of rotating the grate, itis desirable that the dust arising be carried off to the chimney and for 'this purpose we have provided in front of the fire box a slightly curved upright passage 33 which extends from the ash pit to the top of the fire box and is provided at its upper end with a damper 34 accessible through the opening of door 35 through which the lire box is supplied with fuel. By o-pening a door 36 at the front of the ash pit and opening the damper 34 just referred to, a lively draft will be created through the dust passage 33 and carry all dust up through the chimney.

To supply air for combustion we have provided in front Vof the fire box and also in front of the dust passage a door 44 which gives access to a sector shaped passage 38 which extends about 90O around the front portion of the fire box and has its opposite ends overlapping the extremities of the circumferential draft passage 40 encircling the lower portion of the fire box (except in the front). This pass-age 40 has an yopenlng 41 at the bottom of its rear portion which communicates with the ash pit, and openings 39 in the vupper surface of the underlying' portions of its extremities the purpose of which will be hereinafter described.V The flooring of the passage 38 only extends about 45 around the fire box thus forming openings at 'each end of said passage which register with the underlying openings in the passage 40. Air admitted through the opening of door 44 into the draft passage 3S will pass rthrough the openings in the extremities of this passage, enter the chamber 40, pass therethrough and through the opening 41 in its bottom, and enter the ash pit from whence it will pass to the grate.

The door opening 37 is closed by a damper 44 pivoted on a bolt 45 upon the inner end of which' is a nut, while between the nut and the part through which thebolt passes is a coiled spring 46 (see Figs. 2 and 13). By screwing up the nut, the pressure of the spring is increased lsufficiently to hold the damper in any position to which it may be turned, to open it, more or less, and the de gree to which it is opened may be indicated by a pointer 47 operating in connection with a curved line of graduated figures (see F ig. 7) and when the operator has found that a certain adjustment of the damper produces the most` favorable result, he can always readily adjust the damper to that point by observing the position of the pointer on the graduated scale. In each adjusted position the pointer rests in a notch in a curved bar 48 attached to the stove, and isvheld therein by therspring 46.

In order to-provide for a check draft we form a curved air passage 49 in front of the dust chamber 33 and above the draft passage 38, and we furnish this chamber with a front'opening and a damper 50 which is constructed and operated in all respects in the same manner as described in connection with the damper 44, being provided also with a pointer, curved bar and graduated scale as Shown in Fig., 7.

The check draft passage 49 has the oppio-i site sides of its upper end provided with. openings 51 which communicate with a cil cumferential passage 51 which surrounds the upper end of the lirebox and communicates with downwardly and inwardly inclined ports 52, the air passing from the `passage 51 through these ports into the firebox above the fuel and thence through the regular course to the chimney, thus checking the draft through the fuel in a well known manner.

The object attained by having the passage through which the air for combustion passes before entering through the grate, and the passage through which the check draft is passed before it enters the firebox above the fuel, pass substantially around the lirebox is to bring the air into contact with the lirebox and heat it thoroughly before it is per mitted to pass through or enter into contact with the fuel in the lirebox, the advantage of heating air for these purposes being too well known in the art to require particular description here.

lVe have provided, in Contact with the wall of the irebox, a suitable number of semi-cylindrical vertical passages 53 which extend through the greater portion of the length of the iirebox and each communicates, by means of a vertical row of ports 54 with the fuel in the lirebox at different heights, the bottom ends of these passages being open to receive the air from the ash pit, and the top ends being closed to prevent the escape of the air except through the ports 54. rlhe object of this arrangement is to admit the air heated in this passage through the llues into the irebox through the ports 54 at various elevations so that heated air will thus be furnished to the fuel at many points. rl`his will form carbon-monoxid gas which is combustible and will be consumed by lire, out of the carbon-dioxid gas, which is not combustible but which is formed by the contact of the heated air through the grate with the heated carbonio gases from the coal. This carbon-dioxid passes out through the lire and gives up about one half of the oxygen contained, thus forming, when contacting with the heated air entering through the ports 54, combustible carbon-monoxid, as before stated.

The firebox is surrounded by a series of radially extending vertical ribs 55, which extend from about two inches above the air draft passage 40 to about two inches below the top of the firebox. (See F ig. These ribs may be formed integral with the firebox or may be secured thereto in any suitable manner, and serve to prevent the firebox walls from warping under the conditions to which they are subjected. These ribs are surrounded by a sheet metal, cylindrical covering 5G which partly circumscribes the lower portion of the lire-pot and has the rear and side portions of its lower edge terminating about 2 inches above the base 2l, thereby forming an inlet by which the air may enter the passages 57. Circulating passages 57 are formed between these ribs 55, and air entering at the bottom thereof passes up between the firebox and the sheet metal covering 56, its course after leaving these passages being hereinafterl described. Another advantage due to the provision of these ribs is that the air circulating between the sheet metal covering 56 and the lirebox, will prevent the sheet metal covering being heated to a sufliciently high degree to burn off the blacking, and thus destroy the appearance of the stove.

rlhe air passing through the passages l57` between the ribs 55 enters and passes through a series of tubes 58 located in the body l2 and surrounded by the products of combustion rising from the fuel in the firebox, whereby they are thoroughly heated and continue to heat the air passing through them until it emerges from their upper ends into the air chamber 73 formed` by the perforated or reticulated dome 59 on the top of the stove, from which it passes in a highly heated state into the room in which the stove is located.

A passage 60 is provided on the exterior of the rear portion of the ash pit, having its lower end open as at61, and controlled by a valve 62, and a pipe 63 leading from this opening communicates with the air in the room, or may be carried through the floor or walls so as to communicate with the outside air. At its upper en d, the passage 60 communicates by an elbow 64, with a passage 65 which passes up in contactwith the rear ,surface ofthe wall of the firebox and between it and the sheet metal covering 56, the passage 65 communicating with a pipe 66 which passes up partially through the body 4:2 into a horizontal box or drum 67 disposed within the body 42, said box or drum 67 having a vertical exit pipe 68 leading therefrom to a supplementary central dome 70 on the top of the stove, from which, the heated air may be permitted to pass out as rapidly as may be desired by the turning of a damper 7l. The drum 67 is provided with acurved baffle plate 72 forming about two-thirds of a cylinder and standing under the rear wall of the pipe 68 with its free edges toward the front of the stove so that air passing into the said drum 67 through the pipe 66 will be deiiected and caused to contact with the walls of the drum 67 in all of its parts.

By means of the construction and arrangement hereinbefore describedit will be obvious that we have provided means whereby an extremely large percentage of the heat evolved by the combustion of the coal is utilized.

`without departing from l within the base vthe combination of a base,

rllhe foregoing is such a full and detailed description of the construction and operation of our improved heating stove that any further enumeration of its virtues at this point is deemed unnecessary, but we desire it to be understood that we do not wish to conne ourselves to the exact construction and arrangements specifically described, vfor the obvious reason that many slight changes and variations may be made the spirit or scope of the invention set forth in the appended claims. ,i

Wha-t is claimed as new is 1. In a stove of the character described, the combination of a base, a cylindrical re pot having the lower end thereof disposed and provided with a grate, a main body above said lire pot having communication therewith and with. the chimney, a reticulated dome disposed on said main body and having therein an air chamber, an annular casing depending from the said main body, said casing having the front portion .of its lower end secured to said base, the remaining rear and sides thereof being `spaced therefrom `thereby forming a circumferential air inlet, air passages interposed between said re pot and casingand communicating with said air inlet whereby the airmay circulate through said passages and `protect the casing from the deteriorating effect of the heat radiating from said fire pot, and means whereby the air in said passages may be conveyed in a heated f condition to the airchamber in said dome. y t r 2. InV a stove of the character described, a cylindrical fire pot having the lower end thereof disposed within the base and pro-vided witha grate,

a mainbody above said tire pot having communication therewith and with the chimney, areticulated domedisposed on said main body and `having therein an air chamber, an annular casing depending from the said main body, said casing having the front portion of its lower end secured to said base, the remaining rear and sides thereof being spaced therefrom thereby forming a circumferential air inlet, radially extending wings formed on the side ofsaid lire `pot and adapted to coact with said casing to form vertically extending air passages, the lower ends of which communicate with said air inlet whereby air may circulate through said passages and protect thecasing from the deteriorating effect of the heat radiating from said fire pot, and means whereby the air in said passages may be conveyed in a heated condition to the air chamber in said dome.

3. In a stove of the character described, the combination of a base, a cylindrical fire pot having the lower end thereof disposed within the base and provided with a grate,

a main body above said lire pot having communication therewith and with the chimney, a reticulated ,dome disposed on said main body and having therein an air chamber, an

annular casing depending from the said main body, said casing having the front portion of itslower end secured to said base, the remaining rear and sides thereof being spaced therefrom thereby forming a circumferential air inlet, air passages interposed between said fire pot and casing and communicating with said air inlet whereby the air circulating through said passages will protect the casing from the deteriorating effect of the heat radiating from said fire pot, and upright tubes arranged within said main body connecting said vertical air passages with the air chamber in said dome whereby the airfin sai-d passages may be conveyed to said chamber and heated in transit by the products of combustion in said main body.

4. In fa stove of the character described, the combination `of a base, a cylindrical fire pot 'having the lower end thereof disposed within the base and provided with a grate, a main body above said fire pot having `coin- Innnic'ation *therewith and with the chimney, a reticulat'ed ldome disposed jon said main body and having therein an air chamber, 'an ann'uiar casing depending from said main body, said easing havin-g the front portion of itslower "end secured to said base, the remaining rear and sides thereof being spaced therefrom, thereby forming a circumferential inlet, air passages interposed between said fire pot and casing and communicating with 'said air inlet 'whereby the air Acirculati'nig through -said passages will protect the casing from the deteriorating eiiect of the heat radiating from said iire pot, means whereby the lair-in said passages may be conveyed in a lheated condition to the air chamber in said dome, an auxiliary air heating means arranged within said stove 'and comprising a drum located within said main body immediately above the fire pot and adapted to be heated by the vproducts of combustion arising therefrom, means whereby outside air is conveyed to 'and heated by said drum,`

and an upright pipe connecting said drum with said air chamber whereby the heated air in the former may be carried to the latter and conveyed to the exterior of the stove.

55. In a stove of the character described, the combination yof a base, a cylindrical fire p'ot having the lower end thereof disposed within lthe base and provided with a grate, a main body above said iire pot having communication *therewith and with the chimney, a dome ydisposed on said main body having therein an air chamber, an annular 'casing dependiiilg from the said main body, said casing having -'the front portion of its lower` end secured to said base, the remaining rear and sides thereof being spaced therefrom, thereby forming a circumferential air inlet, air passages interposed between said lire pot and casing and communicating with said air inlet whereby the air circulating through said passages will protect the casing from the heat radiating from said lire pot, a drum located within said main body immediately above the fire pot and adapted to be heated by the products of 'combustion arising therefrom, means whereby outside air is conveyed to and heated by said drum, a baille plate within said 'drum for deilecting the air passing therethrough whereby the latter may be brought into Contact with the heated walls of said drum, and a vertically disposed pipe having its lower end communicating with said 'drum and its upper end entering said air 'chamber whereby the heated air in the former may be conducted to the latter and conveyed to the exterior of the stove.

in testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

yELGrIN F. PAQUIN. CHARLES C. PAQUIN.

Witnesses to the signature of Elgin F. Paquin: I y

FLORA M. STOUGHTON, E. F. STOUGHTON.

Vi'tnesses to the signature of Charles C. Paquin:

F. L. LAURENCE, A. M. VVHnnLnn.

Copies 'of this "pa'tent may be obtained for ve cents each, by addressing the Commissioner of latents,

Washington, D. C. 

